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Codeforces Round 940 (Div. 2)
4 days
Register now »
*has extra registration
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Difficulty:
—
data structures
combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
games
geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
matrices
meet-in-the-middle
number theory
probabilities
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Custom test
Problems
#
Name
1703B
ICPC Balloons
data structures
,
implementation
800
x44810
1760C
Advantage
data structures
,
implementation
,
sortings
800
x34712
1722C
Word Game
data structures
,
implementation
800
x29217
1714B
Remove Prefix
data structures
,
greedy
,
implementation
800
x29156
1690C
Restoring the Duration of Tasks
data structures
,
greedy
,
implementation
800
x25315
1497A
Meximization
brute force
,
data structures
,
greedy
,
sortings
800
x23805
1730A
Planets
data structures
,
greedy
,
sortings
800
x22461
1720B
Interesting Sum
brute force
,
data structures
,
greedy
,
math
,
sortings
800
x20708
1200A
Hotelier
brute force
,
data structures
,
implementation
800
x19880
1767B
Block Towers
data structures
,
greedy
,
sortings
800
x19530
1956A
Nene's Game
binary search
,
brute force
,
data structures
,
games
,
greedy
800
x15485
1799A
Recent Actions
data structures
,
greedy
,
implementation
,
math
800
x11318
1807D
Odd Queries
data structures
,
implementation
900
x28268
1380A
Three Indices
brute force
,
data structures
900
x22937
1918B
Minimize Inversions
constructive algorithms
,
data structures
,
greedy
,
implementation
,
sortings
900
x21829
1709B
Also Try Minecraft
data structures
,
dp
,
implementation
900
x21764
1689B
Mystic Permutation
data structures
,
greedy
900
x17061
1430C
Numbers on Whiteboard
constructive algorithms
,
data structures
,
greedy
,
implementation
,
math
1000
x23238
1907B
YetnotherrokenKeoard
data structures
,
implementation
,
strings
1000
x22906
1800C1
Powering the Hero (easy version)
data structures
,
greedy
1000
x22212
1955B
Progressive Square
constructive algorithms
,
data structures
,
implementation
,
sortings
1000
x20683
1622B
Berland Music
data structures
,
greedy
,
math
,
sortings
1000
x20475
1165B
Polycarp Training
data structures
,
greedy
,
sortings
1000
x20121
1438B
Valerii Against Everyone
constructive algorithms
,
data structures
,
greedy
,
sortings
1000
x18307
1798B
Three Sevens
brute force
,
data structures
,
greedy
,
implementation
1000
x15811
368B
Sereja and Suffixes
data structures
,
dp
1100
x39301
519B
A and B and Compilation Errors
data structures
,
implementation
,
sortings
1100
x37527
1324C
Frog Jumps
binary search
,
data structures
,
dfs and similar
,
greedy
,
implementation
1100
x26751
1213B
Bad Prices
data structures
,
implementation
1100
x25483
1703D
Double Strings
brute force
,
data structures
,
strings
1100
x24144
1669F
Eating Candies
binary search
,
data structures
,
greedy
,
two pointers
1100
x22774
1511C
Yet Another Card Deck
brute force
,
data structures
,
implementation
,
trees
1100
x21990
1702C
Train and Queries
data structures
,
greedy
1100
x21374
1800C2
Powering the Hero (hard version)
data structures
,
greedy
1100
x20964
1638B
Odd Swap Sort
data structures
,
math
,
sortings
1100
x20326
1921D
Very Different Array
data structures
,
greedy
,
sortings
,
two pointers
1100
x19739
1428C
ABBB
brute force
,
data structures
,
greedy
,
strings
1100
x19579
1862C
Flower City Fence
binary search
,
data structures
,
implementation
,
sortings
1100
x19475
767A
Snacktower
data structures
,
implementation
1100
x19114
1917B
Erase First or Second Letter
brute force
,
combinatorics
,
data structures
,
dp
,
strings
1100
x19076
1760E
Binary Inversions
data structures
,
greedy
,
math
1100
x19050
1492B
Card Deck
data structures
,
greedy
,
math
1100
x18065
1807G1
Subsequence Addition (Easy Version)
brute force
,
data structures
,
dp
,
greedy
,
implementation
,
sortings
1100
x17711
1656B
Subtract Operation
data structures
,
greedy
,
math
,
two pointers
1100
x17537
501B
Misha and Changing Handles
data structures
,
dsu
,
strings
1100
x15525
1566D1
Seating Arrangements (easy version)
data structures
,
greedy
,
sortings
1100
x13735
427B
Prison Transfer
data structures
,
implementation
1100
x13665
755B
PolandBall and Game
binary search
,
data structures
,
games
,
greedy
,
sortings
,
strings
1100
x10900
522B
Photo to Remember
*special problem
,
data structures
,
dp
,
implementation
1100
x8634
834B
The Festive Evening
data structures
,
implementation
1100
x8500
1575A
Another Sorting Problem
data structures
,
sortings
,
strings
1100
x4184
1520D
Same Differences
data structures
,
hashing
,
math
1200
x42194
1364A
XXXXX
brute force
,
data structures
,
number theory
,
two pointers
1200
x26676
1512D
Corrupted Array
constructive algorithms
,
data structures
,
greedy
1200
x21590
1800D
Remove Two Letters
data structures
,
greedy
,
hashing
,
strings
1200
x21537
1006C
Three Parts of the Array
binary search
,
data structures
,
two pointers
1200
x20092
1598C
Delete Two Elements
data structures
,
dp
,
implementation
,
math
,
two pointers
1200
x19946
961B
Lecture Sleep
data structures
,
dp
,
implementation
,
two pointers
1200
x19045
1790D
Matryoshkas
data structures
,
greedy
,
sortings
1200
x17967
1793C
Dora and Search
constructive algorithms
,
data structures
,
two pointers
1200
x17914
1846C
Rudolf and the Another Competition
constructive algorithms
,
data structures
,
dp
,
greedy
,
sortings
1200
x17803
1679B
Stone Age Problem
data structures
,
implementation
1200
x16809
1669E
2-Letter Strings
data structures
,
math
,
strings
1200
x16759
1730C
Minimum Notation
data structures
,
greedy
,
math
,
sortings
1200
x15983
637B
Chat Order
*special problem
,
binary search
,
constructive algorithms
,
data structures
,
sortings
1200
x14920
1104B
Game with string
data structures
,
implementation
,
math
1200
x14386
1582C
Grandma Capa Knits a Scarf
brute force
,
data structures
,
greedy
,
strings
,
two pointers
1200
x14191
1763B
Incinerate
binary search
,
brute force
,
data structures
,
implementation
,
math
,
sortings
1200
x13826
1848B
Vika and the Bridge
binary search
,
data structures
,
greedy
,
implementation
,
math
,
sortings
1200
x13209
1214C
Bad Sequence
data structures
,
greedy
1200
x12797
18C
Stripe
data structures
,
implementation
1200
x12399
879B
Table Tennis
data structures
,
implementation
1200
x11815
701B
Cells Not Under Attack
data structures
,
math
1200
x11550
1951B
Battle Cows
binary search
,
data structures
,
greedy
1200
x10803
264A
Escape from Stones
constructive algorithms
,
data structures
,
implementation
,
two pointers
1200
x10577
4C
Registration System
data structures
,
hashing
,
implementation
1300
x76418
600B
Queries about less or equal elements
binary search
,
data structures
,
sortings
,
two pointers
1300
x27183
1538C
Number of Pairs
binary search
,
data structures
,
math
,
two pointers
1300
x26793
1381A1
Prefix Flip (Easy Version)
constructive algorithms
,
data structures
,
strings
1300
x19797
1915E
Romantic Glasses
data structures
,
greedy
,
math
1300
x18103
1703F
Yet Another Problem About Pairs Satisfying an Inequality
binary search
,
data structures
,
dp
,
greedy
,
sortings
1300
x17956
1927D
Find the Different Ones!
binary search
,
brute force
,
data structures
,
dp
,
dsu
,
greedy
,
two pointers
1300
x17890
1698C
3SUM Closure
brute force
,
data structures
1300
x17817
1234B2
Social Network (hard version)
data structures
,
implementation
1300
x16421
1498B
Box Fitting
binary search
,
bitmasks
,
data structures
,
greedy
1300
x15983
1676F
Longest Strike
data structures
,
greedy
,
implementation
,
sortings
,
two pointers
1300
x15691
1237B
Balanced Tunnel
data structures
,
sortings
,
two pointers
1300
x14576
1736C1
Good Subarrays (Easy Version)
binary search
,
data structures
,
schedules
,
two pointers
1300
x14420
1638C
Inversion Graph
data structures
,
dsu
,
graphs
,
math
1300
x14320
1265B
Beautiful Numbers
data structures
,
implementation
,
math
,
two pointers
1300
x12281
1007A
Reorder the Array
combinatorics
,
data structures
,
math
,
sortings
,
two pointers
1300
x11966
1726C
Jatayu's Balanced Bracket Sequence
data structures
,
dsu
,
graphs
,
greedy
1300
x11831
1100B
Build a Contest
data structures
,
implementation
1300
x10872
1870C
Colorful Table
binary search
,
data structures
,
dp
,
implementation
,
math
,
two pointers
1300
x10651
1867C
Salyg1n and the MEX Game
constructive algorithms
,
data structures
,
games
,
greedy
,
interactive
1300
x10467
777B
Game of Credit Cards
data structures
,
dp
,
greedy
,
sortings
1300
x9322
982B
Bus of Characters
data structures
,
greedy
,
implementation
1300
x8115
932B
Recursive Queries
binary search
,
data structures
,
dfs and similar
1300
x7766
572B
Order Book
data structures
,
greedy
,
implementation
,
sortings
1300
x6725
808B
Average Sleep Time
data structures
,
implementation
,
math
1300
x6543
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